A particle of mass 5kg strikes a body of mass 2.5 kg atrest elastically. The 2.5 kg mass after collision moves with a kinetic energy of 5J. The kinetic energy of 5 kg mass before collision is

A particle of mass 5kg strikes a body of mass 2.5 kg atrest elasticall

1.	A particle of mass 5kg strikes a body of mass 2.5 kg atrest elastically. The 2.5 kg mass after collision moves with a kinetic energy of 5J. The kinetic energy of 5 kg mass before collision is
Answer» 0.62 J 5.625 J 7.68J 4.20 J Answer :B